nucleus
Pronunciation:
/ˈnjuː.kli.əs//ˈnuːkli.əs/noun
Definitions
The core, central part of something, around which other elements are assembled.
An initial part or version that will receive additions.
Example: This collection will form the nucleus of a new library.
The massive, positively charged central part of an atom, made up of protons and neutrons.
A large membrane-enclosed organelle found in eukaryotic cells which contains genetic material.